Question

a large population of squirrels lives at a forest. in the last 50 years, the size of the squirrel population has stayed the same. what must be true about the squirrel population during the last 50 years?
a. the number of squirrels that were born was the same as the number of squirrels that died.
b. humans started protecting the squirrel population so they stopped dying.
c. the squirrels did not have any baby squirrels during these years.
d. no squirrels were born and no squirrels died

Explanation:

Population size remains constant when the number of births equals the number of deaths. Option B is too extreme as squirrels still face natural - causes of death even with protection. Option C and D are also extreme; it's not necessary that no births or deaths occurred, just that they balanced out.

Answer:

A. The number of squirrels that were born was the same as the number of squirrels that died.